28116233 has 2 divisors, whose sum is σ = 28116234. Its totient is φ = 28116232.

The previous prime is 28116229. The next prime is 28116241. The reversal of 28116233 is 33261182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 12020089 = 4012^2 + 3467^2 .

It is a cyclic number.

It is not a de Polignac number, because 28116233 - 2² = 28116229 is a prime.

It is a super-2 number, since 2×28116233² = 1581045116220578, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28116533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14058116 + 14058117.

It is an arithmetic number, because the mean of its divisors is an integer number (14058117).

Almost surely, 2^28116233 is an apocalyptic number.

It is an amenable number.

28116233 is a deficient number, since it is larger than the sum of its proper divisors (1).

28116233 is an equidigital number, since it uses as much as digits as its factorization.

28116233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 28116233 is about 5302.4742337894. The cubic root of 28116233 is about 304.0784978786.

The spelling of 28116233 in words is "twenty-eight million, one hundred sixteen thousand, two hundred thirty-three".